When Mendel crossed yellow-seeded and green-seeded pea plants, all the offspring were yellow seeded. When he took these F1 yellow-seeded plants and crossed them to green-seeded plants, what genotypic ratio was expected?
a. 1:2:1
b.1:1
c. 3:1
d. 1:1:1:1
Answer: b. 1:1
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